Had customer several years back with a 63 Corvette. He bought 4 date coded T-3's off the bay. Paid a good price for them. While doing some other work he asked that I put them in. I did. had to call him and say well we have 1 good hi beam and 1 good low beam. He angrily said the seller said they were good. I responded with, technically they were, for about 5 seconds, then got real BRIGHT and poof.
the filaments were good but the atmospheric seal wasn't so POOF! 😲👎🤣